Subject: Re: auditory scrambling From: Valeriy Shafiro <Valeriy_Shafiro@xxxxxxxx> Date: Sat, 22 Dec 2007 13:07:00 -0600 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>Dear all, Here is another twist on scrambling sounds. I finally located the Java applet I wrote some time back that does that. In addition to braking up sounds in equal duration segments and shuffling them, it also gives an option of putting the pieces back together. When I was writing it, I had some training applications in mind, but that project, unfortunately, never took off. If anyone finds this interesting and worthy of pursuing further, I would be interested in collaborating. Also, I can send my highly amateurish Java code, if anyone want to play with others sounds, since applets do not allow to select files from local machines (as far as I now). Finally, the utterance examples used there were selected merely for their convenience and accessibility -- not to make any statements. Here's the link: http://www.rushu.rush.edu/cds/arl/sonicpuzzle/ Happy Holidays to all! Valeriy ------------------------------------------------------------- Valeriy Shafiro Communication Disorders and Sciences Rush University Medical Center Chicago, IL office (312) 942 - 3298 lab (312) 942 - 3316 email: valeriy_shafiro@xxxxxxxx -----AUDITORY - Research in Auditory Perception <AUDITORY@xxxxxxxx> wrote: ----- To: AUDITORY@xxxxxxxx From: Dan Ellis <dpwe@xxxxxxxx> Sent by: AUDITORY - Research in Auditory Perception <AUDITORY@xxxxxxxx> Date: 12/19/2007 05:56PM Subject: Re: auditory scrambling Attached is some Matlab code written by Keansub Lee in my lab when we were looking at making "personal audio lifelog" recordings unintelligible while preserving the statistics needed for classifying environment and speakers. It chops the sound into overlapping 200ms windows and permutes them within a 1 second radius. Basic usage is just y = scrambling(d,sr); where d is the input audio and sr is the sampling rate. See comments in the file for changing the parameters (window length, overlap, scramble radius etc.). Also attached are a brief speech sound before and after scrambling. Apologies to digest readers who will probably see a great deal of meaningless ascii. DAn. [attachment "scrambling.m" removed by Valeriy Shafiro/Rush/RSH] [attachment "mpgr1_sx419.wav" removed by Valeriy Shafiro/Rush/RSH] [attachment "scrambled.wav" removed by Valeriy Shafiro/Rush/RSH]